6 letter words:
affine12,
iffier12,
niffer12,
fainer9,
infare9,
5 letter words:
fifer11,
afire8,
feria8,
finer8,
frena8,
infer8,
infra8,
4 letter words:
fief10,
fife10,
naff10,
raff10,
riff10,
fain7,
fair7,
fane7,
fare7,
fear7,
fern7,
fiar7,
fine7,
fire7,
firn7,
frae7,
naif7,
neif7,
reif7,
rife7,
airn4,
earn4,
inia4,
near4,
rain4,
rani4,
rein4,
3 letter words:
aff9,
eff9,
iff9,
arf6,
fan6,
far6,
fen6,
fer6,
fie6,
fin6,
fir6,
ref6,
rif6,
ain3,
air3,
ane3,
ani3,
are3,
ear3,
era3,
ern3,
ire3,
nae3,
rai3,
ran3,
rei3,
ria3,
rin3,
2 letter words:
ef5,
fa5,
fe5,
if5,
ae2,
ai2,
an2,
ar2,
en2,
er2,
in2,
na2,
ne2,
re2,